package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.security.auth.login.LoginException;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * @author majun
 * @package sky-take-out
 * @date 2024/5/14 : 上午8:27
 */

@Service
public class UserServiceImpl implements UserService {

    //微信登录服务接口地址
    private static final String WX_LONGIN = "https://api.weixin.qq.com/sns/jscode2session";
    private static final String GRANT_TYPE = "authorization_code";

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatProperties weChatProperties;

    /**
     * 微信登录
     *
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {

        //调用接口获取微信用户唯一标识符   openId
        String openid = getOpenId(userLoginDTO.getCode());

        //判断openId是否为空
        if (openid == null || openid.equals("")) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //查询用户是否为新用户，自动完成注册
        User user = userMapper.getByOpenId(openid);

        if (user == null) {
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }

        //返回用户对象
        return user;
    }

    /**
     * 调用接口获取微信用户唯一标识符   openId
     * @param code
     * @return
     */
    private String getOpenId(String code) {
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", GRANT_TYPE);
        String json = HttpClientUtil.doGet(WX_LONGIN, map);

        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");

        return openid;
    }
}
